Oxygen Sensors - Oxygen Sensor Support - Apogee Instruments, Inc.

	SO-110 Slower Response Higher Output	SO-120 Slower Response Higher Output	SO-210 Faster Response Lower Output	SO-220 Faster Response Lower Output	SO-411 Slower Response	SO-421 Faster Response
Input Voltage Requirement	-	-	-	-	5.5 to 24 V DC	5.5 to 24 V DC
Current Draw	-	-	-	-	0.6 mA (quiescent); 1.3 mA (active)	0.6 mA (quiescent); 1.3 mA (active)
Reference Temperature Sensor	Thermistor	Type-K Thermocouple	Thermistor	Type-K Thermocouple	Thermistor	Thermistor
Measurement Range	0 to 100 % O₂	0 to 100 % O₂	0 to 100 % O₂	0 to 100 % O₂	0 to 100 % O₂	0 to 100 % O₂
Sensitivity (at sea level, 101.3 kPa)	52 to 58 mV in 21 % O₂, 2.6 mV per % O₂, 26 µV per 0.01 % O₂	52 to 58 mV in 21 % O₂, 2.6 mV per % O₂, 26 µV per 0.01 % O₂	12 to 13 mV in 21 % O₂, 0.6 mV per % O₂, 6 µV per 0.01 % O₂	12 to 13 mV in 21 % O₂, 0.6 mV per % O₂, 6 µV per 0.01 % O₂	-	-
Response Time (time required to read 90 % of saturated response)	60 s	60 s	14 s	14 s	60 s	14 s
Output at 0 % O₂	5 % of output at 20.95 % O₂ or 3 ± 2 mV	5 % of output at 20.95 % O₂ or 3 ± 2 mV	2 % of output at 20.95 % O₂ or 0.3 ± 0.2 mV	2 % of output at 20.95 % O₂ or 0.3 ± 0.2 mV	-	-
Measurement Repeatability	Less than 0.1 % of mV output at 20.95 % O₂	Less than 0.1 % of mV output at 20.95 % O₂	Less than 0.1 % of mV output at 20.95 % O₂	Less than 0.1 % of mV output at 20.95 % O₂	Less than 0.1 % of mV output at 20.95 % O₂	Less than 0.1 % of mV output at 20.95 % O₂
Signal Decrease per Year	1.8 % per year (1 mV per year)	1.8 % per year (1 mV per year)	6.3 % per year (0.8 mV per year)	6.3 % per year (0.8 mV per year)	1 mV per year	0.8 mV per year
Oxygen Consumption Rate (galvanic cell sensors consumer O₂ in a chemical reaction with the electrolyte, which produces an electric current)	0.1 µmol O₂ per day at 20.95 % and 23 C	0.1 µmol O₂ per day at 20.95 % and 23 C	0.1 µmol O₂ per day at 20.95 % and 23 C	0.1 µmol O₂ per day at 20.95 % and 23 C	0.1 µmol O₂ per day at 20.95 % and 23 C	0.1 µmol O₂ per day at 20.95 % and 23 C
Operating Environment	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa	-20 to 60 C; 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa
Input Voltage Requirement	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)	12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)
Heater Current Draw	6.2 mA (74 mW power requirement when powered with 12 V DC source)	6.2 mA (74 mW power requirement when powered with 12 V DC source)	6.2 mA (74 mW power requirement when powered with 12 V DC source)	6.2 mA (74 mW power requirement when powered with 12 V DC source)	6.2 mA (74 mW power requirement when powered with 12 V DC source)	6.2 mA (74 mW power requirement when powered with 12 V DC source)
Thermistor Current Draw	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)	0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)
Dimensions	32 mm diameter, 68 mm length	32 mm diameter, 68 mm length	32 mm diameter, 68 mm length	32 mm diameter, 68 mm length	32 mm diameter, 68 mm length	32 mm diameter, 68 mm length
Mass (with 5 m of cable)	175 g	175 g	175 g	175 g	175 g	175 g

SO-110
Slower Response Higher Output

SO-120
Slower Response Higher Output

SO-210
Faster Response Lower Output

SO-220
Faster Response Lower Output

SO-411
Slower Response

SO-421
Faster Response

Input Voltage Requirement

5.5 to 24 V DC

Current Draw

0.6 mA (quiescent); 1.3 mA (active)

Reference Temperature Sensor

Thermistor